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Voltage and, Current Sources, , VERY SHORT ANSWER TYPE QUESTIONS, , ta An ideal current source has resistance,, ae Infinite internal., -2. Draw V-I Characteristics of an ideal current source., Ans,, Current, a, — Voltage, , , , Fig. V-I Characteristics of Ideal Current Source, Q.3. In practical current source, load resistance is,, Ans. Very Low., , Q.4. Ideal voltage source has. internal resistance., Ans. Zero., Q.5. Batteries and D.C generators are practical,, Ans. Voltage., Q.6. A practical current sources finite resistance connected in. to the source., _ Ans. Parallel. a, Q.7. What do you understand by voltage source., Ans. A device which gives or produces output voltage continuously is known as voltage so!, Q.8. Terminal voltage ‘V’ is always more them generated emf ‘EF’ True/False., Ans. False., Q.9. An ideal voltage source donot exist. True/False., , , , , , sources., , , , , , , , Ans. True., , Q.10. Current source is______element. (Active/ passive),, , Ans. Passive., , Q.11.An ideal voltage source should posses resistance. (Dec.-2015), , Ans, Ze10, , , Scanned with CamScanner

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Constant Voltage and Constant Current S, , 15, ources eee, , Q.12. An ideal current source has, Ans. Infinite., , , , internal resistance., , Q.13. A practical current source has ———— internal resistance, (Dec. 2014), Ans. High internal resistance connected in parallel with the source., , , , SHORT ANSWER TYPE QUESTIONS, , Q.1. What do you men by ideal voltage source. Drow its V-I characteristics., , Ans. Ideal Voltage Source- In an ideal voltage source the terminal voltage of sources remains, unchanged irrespective of the load connected to it or the current supplied by it. An ideal voltage, source have zero internal resistance. The ideal d.c. and a.c, voltage source shown in figure., , \ , , , , , Ideal d.c. voltage source Ideal a.c. voltage source, , V-I Characteristic- It is a graph between terminal voltage of source and load impedance/, current drowns from the source., , t, , serminal, voltage, , , , , , —> Load current, — Load impedance, , Q.2. Explain ideal current source. Draw its V-I characteristics., , Ans. Ideal Current Source- Ideal current source supply constant current even on infinite, load. An ideal current source shown in figure., , , , , , I, + Current, Ds, ea CO _, — Load impedance, 9, , ideal current source V-l characteristics, , When output terminal are open circuited it supply a constant current ideally. The power, supplied by source (I’R,) will be infinite as the load connected to source is infinite which is, impossible. So, there is no ideal current source practically., , Scanned with CamScanner

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teeSSsSeo~”™—t—<—“<—:”, :, , Fundamental of Electrical and Electronics Engines,, tin, , 16, has an internal & resistance of 10000. Find th, i, a, , Q.3. Ad.e, source generating ie Vv, i istance is . a, ae if load resis’ cenerated Voltage mg=600V, Internal resistance, "= 1000Q, Load resistance RL= 50W, Eg 600 _ = oe = 0.541 Amp. Ans., Load current, J= Ritr = To00 +60 = 7050, , Q.4. Explain the terms(i) Practical Voltage source, (ii) Practical current source, , Ans. (i) Pratical Voltage sourceknown as practically voltage source as shown in figure., , Voltage source have a small internal resistance in series ig, , . z, , Fig. Practically d.c. /a.c. voltage source, , (ii) Practically current source- A current source having a large internal resistance in, parallel is known as practically current source as shwn in Figure—, , © Us, , , , Fig. Practically current source, , os0, , , , Scanned with CamScanner